永磁往复式发电机的磁场参数计算

Magnetic field parameter calculation of permanent magnet oscillating generator

为准确计算永磁往复式发电机运行时的电磁参数,基于二维有限元法,在考虑端部效应的情况下,建立了发电机的静态磁场数学模型,给出了在静态场下计算发电机运行一周期内电磁参数的方法,并计算了发电机的空载电势、同步电抗以及空载和负载电磁力。仿真及实验结果表明,该方法计算得到的数据与实测数据相比误差较小,避免了瞬态分析运算时间长的问题。

To calculate the electromagnetic parameter of permanent magnet oscillating generator accurately, based on two-dimensional finite element method, in the condition of considering the end effect, the static magnetic field model was created. The method with which electromagnetic parameters in a running period were calculated with was proposed. The no-load electromotive force, synchronous reactance and the no-load, loaded electromagnetic force are worked out. The simulation and experiment results indicates that the data obtained in this way has less error than data actually tested. The problem that too much time is spent on transient analysis is avoided.